A whistle that is made of meat, generally penile meat that has a musical tune played on it such as "Nic Nac Patty Whack" typically by a woman. Although the "Meat Whistle" usually belongs to the male, it sometmes belongs to the transgender female. The tune can still be played on the transgender, however, that would in most circumstances mean that the "tune player" would be gay or really butch although still in female form.

Look here you filthy bitch....play me a tune on my Meat Whistle before I choke you until you die!!!!